2024Final results
2024 election for California Assembly District 21
California State Assembly · California
Diane Papan (D) won with 73.8% of the vote, defeating Mark Gilham (R) by 47.7 points.
Diane PapanDemocrat · winner
73.8%147,233
Mark GilhamRepublican
26.2%52,181
199,414 votes
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 12:13 PM ET
The seat over time
D − R margin in this seat's races around 2024
Races before and after
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 12:13 PM ET